support/scripts/pkg-stats: use parenthesis for print

Use Python 3 style print calls, in order to make pkg-stats Python 3
compliant.

Signed-off-by: Matthew Weber <matthew.weber@rockwellcollins.com>
Reviewed-by: Ricardo Martincoski <ricardo.martincoski@datacom.ind.br>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
1 file changed